Question
Asked Aug 4, 2019
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In the figure, a beam of unpolarized light, with intensity 40 W/m2, is sent into a system of two polarizing sheets with polarizing directions at angles θ1 = 78˚ and θ2 = 90˚ to the y axis. What is the intensity of the light transmitted by the system?

 

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Expert Answer

Step 1

Given

The initial light is unpolarized

Initial intensity Io = 40 W/m2

θ1 = 78˚ and

θ2 = 90˚

Step 2

Solution

 When an unpolarized  light passes through a polarizing sheets its intensity will be reduced to half

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2 40 2 I 20Wm

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Step 3

Intensity after passing thro...

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1, -1,cos' (ө), — ө) 1, 320сos (90— 78) = 19.13Wm I,

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